package com.one.rope.mvp.web.util;

import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

/**  
 * @Title: AESUtil
 * @Package com.ds.platform.core.util
 * @Description: AES加密解密工具类
 * @author ds
 * @date 2018/5/24
 */ 
public class AESUtil2 {

    private static final String KEY_ALGORITHM = "AES";
    private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法


    /**
     * AES 加密操作
     * @param content 待加密内容
     * @param password 加密密码
     * @return 返回Base64转码后的加密数据
     */
    public static String encrypt(String content, String password) throws Exception{
            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(password));// 初始化为加密模式的密码器
            byte[] result = cipher.doFinal(byteContent);// 加密
            return Base64.encodeBase64String(result);//通过Base64转码返回
    }

    /**
     * AES 解密操作
     *
     * @param content
     * @param password
     * @return
     */
    public static String decrypt(String content, String password) throws Exception{
            //实例化
            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
            //使用密钥初始化，设置为解密模式
            cipher.init(Cipher.DECRYPT_MODE, getSecretKey(password));
            //执行操作
            byte[] result = cipher.doFinal(Base64.decodeBase64(content));
            return new String(result, "utf-8");
    }

    /**
     * 生成加密秘钥
     *
     * @return
     */
    private static SecretKeySpec getSecretKey(final String password) throws Exception{
            //返回生成指定算法密钥生成器的 KeyGenerator 对象
            KeyGenerator kg = null;
            kg = KeyGenerator.getInstance(KEY_ALGORITHM);
            //AES 要求密钥长度为 128
            SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
            secureRandom.setSeed(password.getBytes());
            kg.init(128, secureRandom);
            //生成一个密钥
            SecretKey secretKey = kg.generateKey();
            return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为AES专用密钥
    }





    public static void main(String[] args){
//        String key = "hndsqwertyuiop2221dsadsaewqdf";
//        String v = "hello word! 你好 世界！!@#$%^&*()";
//        String content="{xm:王伟,sfzhm:362202199008256210}";
//        String content = "{\"xm\": \"王伟\", \"sfzhm\": \"362202199008256210\"}";
        String content="{'xm':'于晓辉','zjhm':'410423199605188813'}";
        String secret="eYNbNTQ90q";
        try {
            String encode = AESUtil2.encrypt(content, secret);
            System.out.println(encode);
            System.out.println(AESUtil2.decrypt("BgEO4HNo/k+L/R1MARO1B4BsU1AGk+kV7LuSTjSxdS0BXEk9ScKUrgxgkPaj+aK7uABgS0mEditlr756I22BQFmChTWl/VvBjFq+JohFOi4=\\", secret));
//            String decode = AESUtil2.decrypt(encode,key);
//            System.out.println(decode);
        }catch (Exception e){
            e.printStackTrace();
        }
    }


}
